--- title: "Environmental sanitation and fecal-oral route" subject: "Technology, Environment and Society" chapter: 5 key: "semester_7/technology_environment_and_society:env-sanitation-fecal-oral" source: https://www.bctengineer.com/q/semester_7/technology_environment_and_society/env-sanitation-fecal-oral site: BCT Engineering --- # Environmental sanitation and fecal-oral route Technology, Environment and Society · Chapter 5: Water and Air Pollution - Asked in: 2076 Chaitra, 8 marks; 2075 Asoj, 8 marks (asked 2 times) - Video: [The F-Diagram: Pathways of Disease Transmission and Barriers to Protection"](https://www.youtube.com/watch?v=Htk4D0EiBWw) — Learn Public Health With Isaac - Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14 - Page: https://www.bctengineer.com/q/semester_7/technology_environment_and_society/env-sanitation-fecal-oral - Whole chapter: https://www.bctengineer.com/md/semester_7/technology_environment_and_society/chapter-5 ## Question State and explain environmental sanitation. Also discuss pathways of fecal-oral infection transmission route. ## Short answer Environmental sanitation controls physical environmental factors that harm health, including safe excreta disposal, water supply, solid waste and wastewater management, food hygiene, vector control and clean housing. Fecal-oral transmission follows the F-diagram via fluids, fingers, flies, fields and food. Barriers are toilets, safe water, handwashing, food hygiene and fly control. ## Answer **Environmental sanitation** is the control of all those factors in the physical environment that harm, or may harm, human health and well-being. In practice it means safe disposal of human excreta, management of solid waste and waste water, safe water supply, food hygiene, vector control and clean housing, so that disease transmission is cut. #### Components of environmental sanitation 1. **Excreta disposal** – sanitary toilets (pit latrine, VIP latrine, pour-flush, septic tank), sewerage. 2. **Safe water supply** – protected sources, treatment and safe storage. 3. **Solid waste management** – collection, segregation, recycling, composting and sanitary landfill. 4. **Waste water (sullage) and drainage** – soak pits, drains, treatment plants; no stagnant water. 5. **Food sanitation** – hygienic handling, storage and cooking. 6. **Vector and rodent control** – control of flies, mosquitoes, rats. 7. **Housing and personal hygiene** – ventilation, clean kitchens, hand washing. 8. **Control of air and noise pollution.** **Importance:** prevents diarrhoea, cholera, typhoid, hepatitis, worm infections and vector-borne diseases; lowers child mortality; improves dignity (especially for women), school attendance and productivity; and protects water sources. Nepal's national sanitation campaign led to the ODF declaration in 2019 and now focuses on "total sanitation". #### Pathways of fecal-oral infection transmission Pathogens in faeces of an infected person reach a new person's mouth by the **F-diagram** routes: ```text +--> Fluids (water) ------+ +--> Fingers -------------+ FAECES -----+--> Flies ---------------+--> FOOD --> MOUTH +--> Fields/soil ---------+ (new host) ``` 1. **Fluids** – water sources contaminated by sewage, open defecation or leaking pipes; drinking it untreated. 2. **Fingers** – hands not washed after defecation or handling a baby; hands then touch food or mouth. 3. **Flies** – carry pathogens from open faeces and waste to food. 4. **Fields** – open defecation and raw excreta used as manure; contaminated soil and vegetables; children playing on soil. 5. **Food** – the final vehicle when contaminated by water, hands, flies or soil. **Diseases:** cholera, typhoid, diarrhoea, dysentery, hepatitis A/E, polio, worms. **Barriers:** toilets and safe excreta disposal (primary barrier); safe water, hand washing with soap, food hygiene and fly control (secondary barriers); supported by health education and vaccination. ## Check yourself The answer's key points as multiple-choice questions, with the correct option and why. 1. Environmental sanitation is: A. Control of environmental factors that harm human health B. Only building toilets C. Only solid waste collection D. Only water treatment Answer: A. It covers all physical-environment factors harming health. (Key point: Definition) 2. Which is NOT mentioned as a component? A. Food sanitation B. Vector and rodent control C. Excreta disposal D. Nuclear waste management Answer: D. Nuclear waste is not listed. (Key point: Components) 3. How do 'Fields' spread infection? A. Fields release SO2 B. Fields reduce hand washing C. Open defecation and raw excreta as manure contaminate soil and vegetables D. Mosquitoes breed in fields Answer: C. Contaminated soil and vegetables carry pathogens. (Key point: Fields route) 4. What did Nepal's sanitation campaign achieve? A. Elimination of all diseases in 1990 B. Closure of all landfills C. Ban on septic tanks D. ODF declaration in 2019 Answer: D. Nepal declared itself Open Defecation Free in 2019. (Key point: Importance) ## Related in Technology, Environment and Society - [Fecal-oral infection route and prevention](https://www.bctengineer.com/question.md?key=semester_7%2Ftechnology_environment_and_society%3Afecal-oral-route-prevention) — Technology, Environment and Society, chapter 5, asked 2× - [On-site vs off-site sanitation and fecal-oral route](https://www.bctengineer.com/question.md?key=semester_7%2Ftechnology_environment_and_society%3Aonsite-offsite-fecal-oral) — Technology, Environment and Society, chapter 5 - [Pollution, onsite sanitation, health education, fecal-oral](https://www.bctengineer.com/question.md?key=semester_7%2Ftechnology_environment_and_society%3Apollution-sanitation-fecal-oral) — Technology, Environment and Society, chapter 5 - [Water pollution and fecal-oral route](https://www.bctengineer.com/question.md?key=semester_7%2Ftechnology_environment_and_society%3Awater-pollution-fecal-oral) — Technology, Environment and Society, chapter 5 - [Importance of understanding fecal-oral route](https://www.bctengineer.com/question.md?key=semester_7%2Ftechnology_environment_and_society%3Afecal-oral-importance) — Technology, Environment and Society, chapter 5 - [Fecal-oral route and health education](https://www.bctengineer.com/question.md?key=semester_7%2Ftechnology_environment_and_society%3Afecal-oral-health-education) — Technology, Environment and Society, chapter 5 ## Related in other subjects - [Fecal-oral disease transmission route](https://www.bctengineer.com/question.md?key=semester_5%2Fwater_supply_engineering%3Afecal-oral-route) — Water Supply Engineering, chapter 4, asked 7× - [Fecal-oral route and preventive measures](https://www.bctengineer.com/question.md?key=semester_5%2Fwater_supply_engineering%3Afecal-oral-preventive) — Water Supply Engineering, chapter 4